Other information:
If equipped, the winter cover can be used to
enhance heater performance in extremely
cold conditions below −7 °C (20 °F). The
winter cover installs over the grille and
restricts airflow to the engine compartment.
For vehicles that did not come with a winter
cover, a winter cover can be purchased...
In addition to notifying NHTSA (or Transport
Canada) in a situation like this, notify
General Motors.
In the U.S., call 1-800-521-7300, or write:
Buick Customer Assistance Center
P.O. Box 33136
Detroit, MI 48232–5136
In Canada, call 1-800-263-3777 (English) or 1-800-263-7854 (French), or write:
General Motors of Canada Company
Customer Care Centre, Mail Code:
CA1-163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
In Mexico, call 800-200-28425 or 800-466-0818...